Hearing damage may occur when a person is exposed to a sound intensity level of 90.0 dB (relative to the threshold of human hearing) for a period of 9.00 hours. An eardrum has an area of 1.40 x 10+ m². How much sound energy is incident on the eardrum during this time? Number i Units J

A cylinder completely filled with an unknown liquid has a radius of 1.50 cm, a length of 64.0 cm, and a mass of 357 g. An engineer performs an experiment to measure the speed of sound in the liquid. A small speaker emits a sound pulse at one end of the cylinder, which travels through the liquid and is detected by a microphone attached at the other end. The elapsed time between emission of the sound pulse and its detection by the microphone is measured by an electronic circuit to be 5.90 x 10-4 s. What the bulk modulus (in Pa) of the liquid in the cylinder? 3714 x What is the speed of sound in the material? How is it related to the bulk modulus and density of the material? What is the volume of a cylinder? Be careful with units in your calculations. Pa Need Help? Read It Submit Answer

You're using an ultrasonic sensor in the deep depths of the ocean to identify shipwrecks. However, you first need to calibrate your sensor for these conditions, as the speed of sound is unknown in the cold, high pressure conditions you are working in. You set up an experiment in a lab where you recreate the environmental conditions of the deep ocean and place an object 30 m from an ultrasonic sensor. The total travel time of the ultrasonic wave is 33 ms (milliseconds). What is the speed of sound in these conditions?

A source emits sound waves isotropically. The intensity of the waves 3.13 m from the source is 1.99 x 104 W/m². Assuming that the energy of the waves is conserved, find the power of the source. Number i Units

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You are hiking along a trail in a wide, dry canyon where the outdoor temperature is T=28.5 degrees celsius. To determine how far you are away from the canyon wall you yell "hello" and hear the echo t=3.05s later.   a) calculate the speed of sound in the valley in meters per second, assuming the speed at 0 degrees celsius is 332 m/s b) how far are you from the canyon wall, in meters? c) if you stood at the same point on a cold morning where the temperature was T2= -1.5 degrees C, how long would it have taken for you to hear the echo, in seconds?

The intensity level in decibels is defined as 10 log10(I/I0), where I0 is a reference intensity equal to the human threshold of hearing, 10–12 W/m2. What is the intensity of the threshold of pain, 120 decibels? answer is : 10° W/m2   I'm not sure how they got this answer

You may want to review (Page). For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of Temporary deafness. Part A Find the intensity (in W/m²) of a 54.0 dB sound. I₁ = 2.51×10-7 W/m² Submit Previous Answers ✓ Correct Set Up: ß = 10 log (1) with Io - " 1.00 × 10-¹2 W/m². If x = log y and To 1/10 Solve: 3 = 54.0dB gives 5.40 = log (1) I = (2.5 × 105) (1.00 × 10-¹²W/m²) = 2.51 × 10-7W/m² = 105.40 = then = Y 2.5 × 105. 10%.

The speed of sound in air is 340 m/s, and the density of air is 1.20 kg/m³. If the displacement amplitude of a 510.0-Hz sound wave is Pa 14.0 μm, what is its pressure-variation amplitude? i

The speed of sound in a solid medium is given by ?=?/?‾‾‾‾√v=E/ρ where ?E is the value of Young's modulus for the solid and ?ρ is the density.  A sound wave travels at 5.8×1035.8×103 m/s in a steel rod of length 1.11 m, diameter 2.0 cm and mass 7.0 kg.  Use the data to determine the value of the Young's modulus for steel. Give your answer in giga-pascal (GPa, 109 Nm-2).